1. Complies with PCI Express specification revision v3.0, backward compatible with PCIe 2.0, PCIe 1.0 and PCIe1.0a; PCI Power Management specification revision 1.2; 2. Each supports 2.5Gb: 250MB/s, 5Gb: 500MB/s and 8Gb: 1GB/s transmission rate; bus interface: PCI Express 3.0 X16; 3. Support (NVMe), M.2 specification revision 0.9; support 4-port x16 channel M.2 Key M NVMe SSD device; 4. Support M.2 SSD module sizes: 2230, 2242, 2260, 2280, 22110; support M.2 "M" key through PCIe protocol; 5. LED read/write indicator; onboard active cooling fan; automatically detects channel configuration at startup; all ports support hot swapping; operating temperature range: 0~85C System Requirements Win7/Win8/Win8.1/Win10 32 or 64bit, Linux-kernel3.17 or higher, 1 available PCI Express X16 slot Chip: PEX8748 Type: adapter card Material: PCB Color: As shown Package Contents: 1 x PCIe x16 PEX8748 Quad Channel Nvme Server Expansion Card 4 x Screws 1 x Screwdriver 1 x Radiator Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.